<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>弹出框</title>
</head>
<button class="btn">点击</button>

<body>

</body>
<script src="../js/jquery.min.js"></script>
<script src="../js/alert.js"></script>
<script src="../js/test.js"></script>

</html>